“The tendency of a force to produce rotation in a body about an axis is called torque or moment of force.”
The turning effect of a force depends upon two factors:
- The magnitude of force (F)
- Moment arm (n)
The torque about any axis is given by the product of force and moment arm.
Torque = force x moment arm
Ʈ = F x r
Types of Torque:
1. Clockwise torque:
If the body is rotating in the direction of rotation of clock then torque is known as clockwise torque. Clockwise torque is always taken as negative
2. Anticlockwise torque:
If the body is rotating in the opposite direction of rotation of clock then torque is known as anticlockwise torque. Anticlockwise torque is always taken as positive.